A scanning electron microscopy investigation of the antennae of three Peckia Robineau-Desvoidy (Peckia (Euboettcheria) nicasia (Lopes, 1941), Peckia (Sarcodexia) dominicana Lopes, 1982, and Peckia (Peckia) chrysostoma (Wiedemann, 1830)) species of potential forensic relevance, is presented for the first time. The collection of the three species was done using baited traps. The antennae of each species consist of three parts: the scape, the pedicel, and the postpedicel/funiculus, where the arista is located. The distribution and location of sensilla found on the antennae are described. Six types of sensilla were observed. The scape has only chaetic sensilla, the pedicel has chaetic sensilla and setiferous plaques, and the postpedicel bears trichoid, five subtypes of basiconic sensilla, coeloconic sensilla and clavate sensilla. The study also identifies a post-pedicellar button on P. chrysostoma only. The study adds to ultrastructure studies on the antennae of Sarcophagidae, increasing the information available for comparison in phylogeny adaptations and synapomorphy.